(function(root,factory){if(typeof define==='function'&&define.amd){define(factory);}else if(typeof exports==='object'){module.exports=factory(require,exports,module);}else{root.scrollReveal=factory();}}(this,function(require,exports,module){
/*! scrollReveal.js v0.1.3 (c) 2014 Julian Lloyd | MIT license */
window.scrollReveal=(function(window){'use strict';var nextId=1;var requestAnimFrame=(function(){return window.requestAnimationFrame||window.webkitRequestAnimationFrame||window.mozRequestAnimationFrame||function(callback){window.setTimeout(callback,1000/60);};}());function scrollReveal(options){this.docElem=window.document.documentElement;this.options=this.extend(this.defaults,options);this.styleBank={};if(this.options.init==true)this.init();}
scrollReveal.prototype={defaults:{after:'0s',enter:'bottom',move:'24px',over:'0.66s',easing:'ease-in-out',opacity:0,viewportFactor:0.33,reset:false,init:true},init:function(){this.scrolled=false;var self=this;this.elems=Array.prototype.slice.call(this.docElem.querySelectorAll('[data-scroll-reveal]'));this.elems.forEach(function(el,i){var id=el.getAttribute("data-scroll-reveal-id");if(!id){id=nextId++;el.setAttribute("data-scroll-reveal-id",id);}
if(!self.styleBank[id]){self.styleBank[id]=el.getAttribute('style');}
self.update(el);});var scrollHandler=function(e){if(!self.scrolled){self.scrolled=true;requestAnimFrame(function(){self._scrollPage();});}};var resizeHandler=function(){if(self.resizeTimeout){clearTimeout(self.resizeTimeout);}
function delayed(){self._scrollPage();self.resizeTimeout=null;}
self.resizeTimeout=setTimeout(delayed,200);};window.addEventListener('scroll',scrollHandler,false);window.addEventListener('resize',resizeHandler,false);},_scrollPage:function(){var self=this;this.elems.forEach(function(el,i){self.update(el);});this.scrolled=false;},parseLanguage:function(el){var words=el.getAttribute('data-scroll-reveal').split(/[, ]+/),parsed={};function filter(words){var ret=[],blacklist=["from","the","and","then","but","with"];words.forEach(function(word,i){if(blacklist.indexOf(word)>-1){return;}
ret.push(word);});return ret;}
words=filter(words);words.forEach(function(word,i){switch(word){case"enter":parsed.enter=words[i+1];return;case"after":parsed.after=words[i+1];return;case"wait":parsed.after=words[i+1];return;case"move":parsed.move=words[i+1];return;case"ease":parsed.move=words[i+1];parsed.ease="ease";return;case"ease-in":parsed.move=words[i+1];parsed.easing="ease-in";return;case"ease-in-out":parsed.move=words[i+1];parsed.easing="ease-in-out";return;case"ease-out":parsed.move=words[i+1];parsed.easing="ease-out";return;case"over":parsed.over=words[i+1];return;default:return;}});return parsed;},update:function(el){var css=this.genCSS(el);var style=this.styleBank[el.getAttribute("data-scroll-reveal-id")];if(style!=null)style+=";";else style="";if(!el.getAttribute('data-scroll-reveal-initialized')){el.setAttribute('style',style+css.initial);el.setAttribute('data-scroll-reveal-initialized',true);}
if(!this.isElementInViewport(el,this.options.viewportFactor)){if(this.options.reset){el.setAttribute('style',style+css.initial+css.reset);}
return;}
if(el.getAttribute('data-scroll-reveal-complete'))return;if(this.isElementInViewport(el,this.options.viewportFactor)){el.setAttribute('style',style+css.target+css.transition);if(!this.options.reset){setTimeout(function(){if(style!=""){el.setAttribute('style',style);}else{el.removeAttribute('style');}
el.setAttribute('data-scroll-reveal-complete',true);},css.totalDuration);}
return;}},genCSS:function(el){var parsed=this.parseLanguage(el),enter,axis;if(parsed.enter){if(parsed.enter=="top"||parsed.enter=="bottom"){enter=parsed.enter;axis="y";}
if(parsed.enter=="left"||parsed.enter=="right"){enter=parsed.enter;axis="x";}}else{if(this.options.enter=="top"||this.options.enter=="bottom"){enter=this.options.enter
axis="y";}
if(this.options.enter=="left"||this.options.enter=="right"){enter=this.options.enter
axis="x";}}
if(enter=="top"||enter=="left"){if(parsed.move){parsed.move="-"+parsed.move;}
else{parsed.move="-"+this.options.move;}}
var dist=parsed.move||this.options.move,dur=parsed.over||this.options.over,delay=parsed.after||this.options.after,easing=parsed.easing||this.options.easing,opacity=parsed.opacity||this.options.opacity;var transition="-webkit-transition: -webkit-transform "+dur+" "+easing+" "+delay+",  opacity "+dur+" "+easing+" "+delay+";"+"transition: transform "+dur+" "+easing+" "+delay+", opacity "+dur+" "+easing+" "+delay+";"+"-webkit-perspective: 1000;"+"-webkit-backface-visibility: hidden;";var reset="-webkit-transition: -webkit-transform "+dur+" "+easing+" 0s,  opacity "+dur+" "+easing+" "+delay+";"+"transition: transform "+dur+" "+easing+" 0s,  opacity "+dur+" "+easing+" "+delay+";"+"-webkit-perspective: 1000;"+"-webkit-backface-visibility: hidden;";var initial="-webkit-transform: translate"+axis+"("+dist+");"+"transform: translate"+axis+"("+dist+");"+"opacity: "+opacity+";";var target="-webkit-transform: translate"+axis+"(0);"+"transform: translate"+axis+"(0);"+"opacity: 1;";return{transition:transition,initial:initial,target:target,reset:reset,totalDuration:((parseFloat(dur)+parseFloat(delay))*1000)};},getViewportH:function(){var client=this.docElem['clientHeight'],inner=window['innerHeight'];return(client<inner)?inner:client;},getOffset:function(el){var offsetTop=0,offsetLeft=0;do{if(!isNaN(el.offsetTop)){offsetTop+=el.offsetTop;}
if(!isNaN(el.offsetLeft)){offsetLeft+=el.offsetLeft;}}while(el=el.offsetParent)
return{top:offsetTop,left:offsetLeft}},isElementInViewport:function(el,h){var scrolled=window.pageYOffset,viewed=scrolled+this.getViewportH(),elH=el.offsetHeight,elTop=this.getOffset(el).top,elBottom=elTop+elH,h=h||0;return(elTop+elH*h)<=viewed&&(elBottom)>=scrolled||(el.currentStyle?el.currentStyle:window.getComputedStyle(el,null)).position=='fixed';},extend:function(a,b){for(var key in b){if(b.hasOwnProperty(key)){a[key]=b[key];}}
return a;}};return scrollReveal;})(window);return scrollReveal;}));